Device for controlling the speed of disk records.



R. T. HOSKING.

DEVICE FOR CONTROLLING THE SPEED OF DiSK RECORDS.

APPLICATION FILED JUNE 1. m5.

Patented Sept. 4, 1917.

5 MW a IN VEN TOR.

A TTORNE Y tit RICHARD T. HOSKING, OF SAGINAV, MICHIGAN.

Application filed June 1, 1915.

To all whom it may concern:

Be it known that I, RICHARD T. Hosnmo, a citizen of the United States,residing at Saginaw, in the county of Saginaw and State of Michigan,have invented certain new and useful Improvements in Devices forControlling the Speed of Disk Records; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

This invention relates to graphophones and pertains more particularly toan improved device adapted to vary the angular speed of the disk whilethe swinging tube that carries the needle moves from the outer peripherytoward the center of the disk.

A further object is to enable the angular speed of. the disk to becontrolled in the same manner as is now customary in graphophones toproduce the proper tones from the record, while still permitting thespeed of the disk to be increased in proportion to the radial distancethat the needle has traveled inwardly from the periphery of the disk.

Another object is to provide a simple and inexpensive device that can beeasily and quickly applied to present-day graphophones by personsunskilled in mechanical matters, whereby the speed of the disk isautomatically controlled for the purposes set forth.

lVith these and certain other objects in view which will appear later inthe specification, my invention consists in the devices described andclaimed and the equivalents thereof.

In the drawings, Figure 1 is a part top plan view of a graphophoneembodying my improvement.

Fig. 2 is a perspective view of the motor and the usual speedcontrolling device, the table on which the motor is mounted being showntipped up to expose the motor.

Fig. 3 is a top plan view of the speedindicating device.

As is clearly shown in the drawings, the device consists in the usualtaper tube 1 carrying the sound box 2, upon which the needle 3 ismounted. 4 represents the disk record, and 5 the speed regulator. -The"foregoing parts are all or" usual construction and arrangement.

When the speed regulator 5 15 set by Specification of Letters Patent.

Patented Sepla'et, 191?. Serial No. 3].,d77.

means of its adjustable pointer 6 to produce any certaln angular speedof the disk at, that angular speed will be maintained until the entirerecord has been reproduced, although the linear velocity of the diskpast the needle 3 will have decreased from'a maximum atthe periphery ofthe disk to a minimum at the inner limit of the disk.

It is one object of my present improvement to provide a device adaptedto be applied to a graphophone bonstructed substantially as abovedescribed, whereby the angular speed of the disk will gradually increaseas the needle travels toward the center of the disk, thereby enabling amuch longer record to be carried on a disk of given diameter, and alsoto assist in main-- taming a g1ven tone quality throughout the entlrerecord.

.Clo apply my improvement, I attach to the swinging taper tube 1 aconnecting member that will automatically change the angular speed ofthe disk, preferably by shifting the adjustable pointer 6 of the speedregulator 5 while the needle is traveling from the outer peripherytoward the center of the disk. The improved device may be of anysuitable construction equivalent to the device as illustrated in Fig. 1,where 7 is a radial arm removably secured to the taper tube and adaptedto swing with the tube and 8 is a longitudinally movable link removablypivotedas at 9- to arm 7 and extending underneath the turn table onwhich the disk 4: is mounted. The other end of the link 8 is preferablypivoted at 10 to one end of arm 6 which carries the cam 11 of the speedregulator 5. Movement of the needle 3 and taper tube 1 from the righttoward the left, in Fig. 1, will swing radial arm 7, drawing the link 8with it and shifting the cam '11 and pointer 6 which is carried by it,so that the pointer will approach the position fast shown in Fig. 3.Thismovement of the pointer 6 actuates the arm 12, Fig. 2 to control thefriction disk 13, both of which are of the usual construction ofgraphophone speed-governors to increase the speed of the disk 4.

When it is desired to reproduce a record' of the type now in common use,in which the disk travels at constant angular speed,

I disconnect the link 8, and, having set the pointer 6 to the properspeed, clamp the pointer to the plate of the speed regulator as by a setscrew 14.

By the means above described, I have produced a speed-control devicethat can be easily and quickly applied to a graphophone of the usualconstruction, without dismantling the instrument, that can be made atsmall expense, is easily applied and not likely to get out or order.

Having thus described my invention, What I claim and desire to secure byLetters Patent is In a graphophone, the combination With the pivotallymounted taper tube carrying the needle, of aradial arm, removablysecured to the taper tube. a link connected to said radial arm andextending underneath 15 the disk record of the graphophone, one end ofsaid link being pivotally secured to the actuating member of the speedregulator of the graphophone for the purposes set forth.

In testimony whereof I allix my signature 20 in presence of twoWitnesses.

RICHARD T. HOSKING.

Witnesses:

NELLIE M. ANGUS, J. V. CARPENTER.

